<!DOCTYPE html>
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    <title>Document</title>
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  <body>
    <script>
      var money = prompt("班长口袋里的余额为：");
      if (money >= 2000) {
        alert("请大家吃西餐");
      } else if (money >= 1500) {
        alert("请大家吃快餐");
      } else if (money >= 1000) {
        alert("请大家喝饮料");
      } else if (money >= 500) {
        alert("请大家吃棒棒糖");
      } else {
        alert("班长下次把钱带够奥");
      }
    </script>
  </body>
</html>
